code: def test_dataframe_response(self):
      response = self.df.chat(
          "brokertitle, type, price of cheapest properties", "dataframe"
      )
      self.assertTrue(
          response.head_csv.find("BROKERTITLE,TYPE,PRICE") != -1
      )
      self.assertTrue(
          response.head_csv.find(
              "Brokered by Century 21...,Land for sale,5800"
          )
          != -1
      )
      self.assertTrue(
          response.head_csv.find(
              "Brokered by Living NY ...,For sale,3225"
          )
          != -1
      )
      self.assertTrue(
          response.head_csv.find(
              "Brokered by Living NY ...,For sale,2494"
          )
          != -1
      )
  
file_path: pandas-ai/integration/test_new_york_housing_market.py
imports: import os
  import unittest
  from pandasai import SmartDataframe
  from pandasai.llm import OpenAI
label_desc: Use image node_id 5 for calling the TestNewYorkHousing obj's underlying member method code with example usage: obj.test_dataframe_response() without return types